Public Resources Code § 40184

(a) “Rural county” means a county or multicounty regional agency that annually disposes of no more that 200,000 tons of solid waste.

(b) (1) Unless the board takes action pursuant to paragraph (2), this section does not affect any reduction granted to a rural county by the board pursuant to Section 41787 prior to January 1, 2008.

(2) The board may review and take action regarding any reduction granted to a rural county in accordance with subdivision (b) of Section 41787.